Panchang in Sevan, Gegharkunik, Armenia Mon 18 Mar 1901

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 01:19 on Mon 18 Mar to 22:36 on Mon 18 Mar, so only Monday’s pradosha (18:07–20:30) falls within it. No text giving Pradosh Vrat’s time was found; pradosha is Tithika’s convention.

Pradosh Vrat: every date in Sevan

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 22:36 on Mon 18 Mar to 19:23 on Tue 19 Mar, so only Monday night’s nishitha (23:41–00:29 Tue) falls within it. No text giving Masik Shivratri’s time was found; nishitha is Tithika’s convention.

Masik Shivratri: every date in Sevan

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 324°–336° is the 28th, Krishna Trayodashi. A day takes the tithi in force at its sunrise, 06:08 here. Dwadashi ended at 01:21, before it. Trayodashi ends at 22:38, when the lead reaches 336°. The lead passed 180° at the full moon of 5 Mar, so the Moon is waning: Krishna paksha.

The night of Sun 17 Mar ran from sunset 18:08 Sun to sunrise 06:08, 12 h 0 m. Cut into 15 muhurtas of 48 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:08 to 18:09, splits into 8 choghadiyas of 1 h 30 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:09 to 06:06 Tue, splits into 8 choghadiyas of 1 h 29 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The fixed stars divide the Moon's path into 27 nakshatras of 13°20′, each in 4 padas of 3°20′. Dhanishtha spans 293°20′–306°40′; the Moon entered its pada 3 at 300°. It leaves at 15:27, for Shatabhisha.

Add the Sun's and the Moon's places among the stars: 334.4° + 301° = 635.4°, one full turn and 275.4°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 266°40′–280°00′ is the 21st, Siddha. It ends at 13:17, then Sadhya.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Trayodashi is Garaja and the second Vanija. Garaja runs until 12:04, when the lead reaches 330°; Vanija until 22:38.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:08 to 06:06 Tue, so the hours after midnight still belong to Somawara.

An amanta month runs from new moon to new moon and takes its name from the rashi the Sun is in at the new moon that begins it: Kumbha gives Phalguna. The Sun enters Meena on 13 Mar, inside the month. The next new moon, 20 Mar, finds it in Meena and begins Chaitra.

A purnimanta month runs from full moon to full moon, so its waning half comes first. It shares its name with the amanta month that its second half falls in: the new moon of 20 Mar, with the Sun in Meena, begins Chaitra. Until then this Krishna paksha reads Chaitra here, and Phalguna in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 30 Mar 1900, 23:30 Fri. Since then the Sun has moved 347.2° round the stars. Vikram Samvat numbers that year 1957; Shaka Samvat numbers it 1822.